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Commit 390c5343 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Arnd Bergmann
Browse files

[POWERPC] spufs: add memory barriers after set_bit 



set_bit does not guarantee ordering on powerpc, so using it
for communication between threads requires explicit
mb() calls.

Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
parent e097b513

arch/powerpc/platforms/cell/spufs/sched.c

+3 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ void spu_start_tick(struct spu_context *ctx) 
		 * Make sure the exiting bit is cleared.

		 */

		clear_bit(SPU_SCHED_EXITING, &ctx->sched_flags);

		mb();

		queue_delayed_work(spu_sched_wq, &ctx->sched_work, SPU_TIMESLICE);

	}

}
@@ -88,6 +89,7 @@ void spu_stop_tick(struct spu_context *ctx) 
		 * makes sure it does not rearm itself anymore.

		 */

		set_bit(SPU_SCHED_EXITING, &ctx->sched_flags);

		mb();

		cancel_delayed_work(&ctx->sched_work);

	}

}
@@ -239,6 +241,7 @@ static void spu_add_to_rq(struct spu_context *ctx) 
	spin_lock(&spu_prio->runq_lock);

	list_add_tail(&ctx->rq, &spu_prio->runq[ctx->prio]);

	set_bit(ctx->prio, spu_prio->bitmap);

	mb();

	spin_unlock(&spu_prio->runq_lock);

}